I have been using K&N filters for many years, My 88 Harley, 89 Ford truck, and all 3 Outbacks. It took over a year for the filters for my twin turbo Genesis to become available (part Nos. 33-5020 and 33-5021) but now that I have them I am very happy. I don't race or live in a super dusty area, but knowing I have the best filters is reassuring. Thanks for the quality and the hat promotion was nice too.

OEM air filter was just replaced during the 55K service, but it was easy to replace it with this K&N air filter. Perfect fit. Audi responds better when needed, especially with the turbo engine. Now wife asks why I'm going so fast :-)

This is my second purchase from this fine Company.
Purchased for our newish Mini Cooper S with the John Cooper Works package boosts the power to roughly 220bhp.
We enjoy the benefits of the increased power in Sport mode, but ultimately expect to see the gain in fuel consumption over the coming months.
I also have one fitted in my 2016 VW Passat Diesel R Line - 200bhp, and am currently returning 67mpg in Eco mode. I don't always drive in Eco mode though.

This is my 4th Duramax. I've been driving them since 2001, logging nearly a million miles. When I sold my '05 which had 302,000 miles , I pulled my K&N air filter and put it in my 08 and drove another 447,000 miles on the same K&N, which I cleaned and re-oiled regularly. K&N filters make great economic sense for us high mileage drivers. Thanks. Tony Lepore

Replaced stock air filter with K&N, it was a direct replacement for my 2015 Corvette Z51, I noticed after the installation that the throttle response felt quicker and that the engine had a little better pickup and sound, I had K&N's on other vehicles and motorcycles and they ALWAYS perform excellent and are easy to maintain, I also replaced the cabin filter with a K&N carbon unit to help clean the air and keep the dust down on the interior of the corvette, I personally do not think there is a better aftermarket filter for the price, ease of installation and longevity, keep making a great product.

Racing a 2002 Maxima in the Champcar series of endurance racing. Cold air intake through the headlight lens.Raced 16 hours at Mosport this July and next race is another 16 hour final at Calabogie , near Ottawa , Canada.

I have a cold air intake on all of my vehicles, including my RV, so when we purchased our new Wrangler JL there was not question I would be installing a cold air intake. I like to see results when I purchase products and the 12.5 HP gain speaks for itself. The fact that this kit uses a polyethylene tube as opposed to a metal tube is a positive to me as metal tubes seem to hold the heat over the polyethylene tubes bringing hotter air into the engine. The Jeep is definately more responsive under acceleration with the air intake installed, and it seems to take less throttle to cruise at a steady speed. The step-by-step installation instructions are excellent and the entire installation took about an hour. I would recommend this air intake to all my fellow Jeepers.

First K&N I've ever purchased. Was a bit skeptical at first with the high end price, but these ARE definitely the HIGH END filter. I particularly like how you can clean them to a light grey color, reapply oil, then they're red again. Color coded process. Simple. We use them on a dirt racing kart and have not had the first sign of dirt in the engine. Fantastic product Thanks K&N

Bloody good filter. I used a slightly longer filter than the OEM and well pleased. Well pleased with the girls who took my order. They were knowledgeable polite and most helpful , I joy to do business with you
Bill a Dewey CEng

I purchased K&N's E-4967 for use on my Honda GX390 which powers my 15' Longtail Jon boat that I use for backcountry work on the remote marshes here in northern Manitoba, Canada. Its unrestricted airflow gives my engine a snappier response. It is easy to install, fits perfectly, and will last a lifetime. I began using K&N air filters over thirty years ago. All my trucks have them. I wouldn't trust my mud boats with anything less.

Awesome K&N product as always. Filter works great and fit like a glove. I did have to wipe off a little bit of excess oil but not an issue whatsoever. And the included hat is sweet and good quality (like all K&N parts). As long as K&N keeps makin 'em, I'll keep buyin 'em.
Thanks,
Blake & his car

Good afternoon, guy at work recommended that I stopped using Fram air filters due to them coming apart under a hard pull with the Cummins engine. He has used the K&N filter and highly advised I get one for my 99 Dodge. I did notice a slight power increase and the engine feels more responsive so I am quite pleased with the result thus far. Thank you for your product and will pass along the info to friends, Andy.

Good instructions for installation. Not sure If i’m Getting better gas mileage, however I am getting better performance in pick up and passing power. I had to grind down the air box so the hood would close. Good thing I had the tools to complete the project.

The product arrived with all the parts, however the pictures on the page for the instillation instructions were not very definitive and I have not been able to make them out yet. At one time advertisments for this system came with a dvd for installation.